William d



(No Model.)

D- ROBINSON.

NUT LOGK. No' pr. 19, 1892.

a a B b a A lllllllll ll! 5 Fi i- NIIIIII UNITE STATES PATENT FFICE.

WVILLIAM D. ROBINSON, OF EL PASO, TEXAS, ASSIGNOR OF ONE-THIRD TOWILLIAM H. SAVAGE, OF SAME PLACE.

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 473,430, dated April19, 1892'.

Application filed November 11. 1891. Serial No. 411,550. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM D. ROBINSON, a citizen of the United States,residing at El Paso, in the county of El Paso and State of Texas, haveinvented-certain new and useful Improvements in Nut-Locks, of which thefollowing is a specification.

This invention relates to an improvement in nut-locks, the object beingto provide a simple and efficient arrangement which is readilyapplicable.

To this end the invention may be said to consist in the novel featuresof construction and combinations of parts hereinafter described andclaimed.

The invention is illustrated in the accompanying drawings, in which-Figure 1 shows a side view of the bolt with the nut in section and thethreaded portion of the bolt partlybroken away. Fig. 2 shows an end viewof the bolt with a top View of the nut. Fig. 3 shows a side view of thenut, looking at one corner of the same. Figs. 4 represent two detailviews of the locking-key-a s de and an end view. Fig. 5 shows an endvlewof said key as it appears when in locked ad ustment, and Fig. 6isasection on the line 6 6 of Fig. 2.

The letter A designates the bolt, and B the 0 nut. A dovetailed grooveor channel a is cut diagonally across the top face of the nut, extendingfrom one corner of the same to the bolt-hole, and the bolt has alongitudinal groove b in one side. When the nut is screwed up on thebolt, a key at, having tapered sides a and a pointed end b,is insertedin the dovetailed groove 0, from the side and driven into the sameacross the nut until its pointed end b enters the groove 6 in the bolt,0 and thus holds the nut from turning. It will be seen that thedovetailed shape of the groove in the nut and the tapered sides of thekey engaging the same will prevent the said key from falling out of thegroove. The key may be prevented from sliding laterally in the grooveand working-away from the bolt by striking the metal of the nut over theend of the said key. This may also be accomplished in the manner shown,where the key has a projecting tang cl, and a recess d is made at oneside of the groove a. With this construction after the key is drivenhome the projecting tang is bent over by a stroke on one side with asuitable tool and then driven down into the recess 61.

It will be obvious that the groove in the bolt may be dispensed with andthe key driven directly into the threads.

It will be observed that the arrangement as above described insures thatthe nut is held securely from turning, and at the same time it may beremoved, when desired, by bending back the portion (1 and breakingoffthe same, if necessary,when the key may be slipped out of the groovelaterally.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The combination of the bolt, the nut having a dovetailed groove acrossits face, of uniform width throughout its length, and a recess at oneside of said groove, and a key having tapered sides and sliding into thedovetailed groove from one side of the nut, said key having a pointedend to engage the bolt and also provided with a projecting part to bebent over into engagement with the recess in.the nut, for the purposedescribed.

In testimony whereof I affix my signature in the presence of twowitnesses.

WILLIAM D. ROBINSON.

Witnesses:

F. E. HUNTER, A. P. (Jones.

